Well-drilling machine



A. C. BRA'DSHAW. WELL ummm; MACHINE.'

Fatemi/s EN). 22g @2L 3 SHEETS-SHEET l INVENTOR m m o w A. yC. BRDSHAW.

WELLDRLLlNG MACHINE. APPLICATION FILED AUG.21,`I920.

l ,369,61, Patented Fab. 22, H2L 3 SHEETS--SHEET 2.

A.' C. BRADSHAW.

WELL DRILUNG MACHINE. APNIC/mon HLEuAAuG.21,192o.

3 SHEETS-SHEET ALBERT CIDNEY BRADSHAW, OF SIMMONS, TEXAS WELL-DRILLING MACHINE.

Application led August 21, 1920. Serial No. 405,069.

To all whom t may concern.:

Be it known that I, ALBERT CIDNEY BRAD- sHAw, a citizen of Live Oak county, Texas, U. S. A., residing' at Simmons, in the county of Live Oak'v and State of Texas, have invented new and useful improvements in Well-Dijilling Machines, of which the following is a specification.

This invention relates `to well drilling devices and has for its object vthe provision of an improved rig designed particularly for drilling oil wells and including novel drive mechanism for conveying power from an engine to a windlass structure for reeling in the drilling cables.'

An important object is the provision of a device of this character in which the windlass structure includes two reels upon one of which'the main cable is wound and upon the other of which the' sand line is wound, clutch mechanism being provided whereby either of the reels may be drivento the eX- clusion of the other.

vAnother object is the provision of a device of this character provided with separate .control levers, one of'which is to operate the clutch mechanism and the other of which operates a brake for stopping the rotation of the reel when the drill strikes the bottom of the hole.

An additional object is the provision or" a device of this character which will be comparatively simple and inexpensive in manufacture, highly eicient in use, easy to opcrate, durable 1n service, and a general 1m- Y provement in the art.

With the above and other objects and vad vantages in,v View, the invention consists in thedetails of construction to be hereinafter more fully described 'and claimed and illus! trated in the accompanying drawings in Figure l is a side elevation of'mycomplete i device',

Flg.y 6 is 'al longitudinal ,l sectional viewV through n'the windlass structure',

'Fig'. 7 is a face view oftonfe of the clutch* members, f

Specification of Letters Patent.

jacent one end a t its other end a re atlvely large wheel25.

Patented Feb.

Fig. e is e aan edge View f the einem@ l pulleys 11 and v12 from which are trained f the main cable 13 carrying the drill, and the sand line 14. The numeral 15 designates heavy timbers which are arranged in spaced parallel relation uponv the top of the ground and twolegs or' the derrick-are .preferably secured to. or rested upon these timbers so as to hold all parts of the device properly associated. 4

Any suitable platform structure or cross beams 16 may be employed upon these tim.l hers 15 whereby tofor'm al strong support. At one side ofthelframework thus `formed are located benches "17 and 18, the former being higher than the latter and servingas a seat for the operator and the latter for a pur ose to be hereinafter described.

E ounted 'upon the 'frame formed by the timbers 15"and beams,l 16 at the end most remote from the derrick 10, is anengine 19 of any ordinary o r preferred type which has its shaft 20 provided at one end with a friction disk 21. of the engine are not described as theyare conventional. Journaled `transversely y of the timbers 15 is a counter-shaft22 mounted in suitable-bearings 23 and'lcarry'ing' adinion 24 and carrying at 1n' order to drive the countershaft from the engine, I provide a bar26 pivoted, as at gage between the wheel 25 and disk 21;. A

suitable retaining catch 30 is provided for holdingthe bar 26 down with the disk 29 The vario-us control features.

carried thereby in operative en agement with the disk 21 and wheel 25. n Ica se it is desired to let the engine run 1dle','1t 1s merely necessary to disengage the catch 30 and move the.bar 26 upwardly.

Mounted on the supporting frame nearest the derrick is a windlass structure-.which includes a hollow supporting shaft 31 upon which are mounted spools or reels 32 and 33 is wound the sand line 14. It will be observed that the main reel 32 is cut away so as to provide more space for the relatively y vlarge main cable. These reels are revoluble uponV the shaft 31. Secured upon one end ofthe shaft 31 is a gear 34 which meshes withthe pinion 24 of the counter shaft. Slidable longitudinally through the hollow shaft 31 is a clutch shaft 35 which carries at `one end a grooved collar 36 engaged by afork 37 carried by a lever 38 which is supported upon the bench 18. Slidable upon but non-rotatable upon the hollow shaft 31 is a clutch member 39 formed as a disk provided on opposite sides with pins 4l),- Extending vthrough this clutch member 1s a pin 41 which passes through elongated slots 42 in opposite sides of the hollow shaft 31 andwhich passes through .a hole in the clutch shaftS so that this clutch member may be. shifted longitudinally upon the shaft 31 by movement of the shaft 35. The confronting ends of the reels 32 and 33 are recessed, asshown at 43 and 44, respectively,

for the` accommodation of the clutch member 39 and at the bottoms of the recesses the reels are provided with'holes 45 for the reception of the pins ,40.whereby either reel may be locked for rotation with the shaft 31.

In order to prevent shifting of the clutch member too fair, I provide the bench 18 with holes'46 within either of which may be engaged a stop pin 47 engageable by thelever 38. When it is desired to use the main reel l 32 the pin 47 is disposed in such position f' the operator.

as to be engagedby one side of the levert/38 and when it is desiredto use the reel 33 the Ipin 47 is so disposed as to be engaged by the other side ofthe lever.

y Disposed in position to engage the adja- -cent rims of the Areels 32 and 33, is a brake band 48 with which is connected a pivoted lever 49 disposed within convenient i'each of The purpose of this brake band is to stop rotation of the reels, when the drill has reached'the bottom of the hole so asY to prevent back lashing of the cable, l 50 drill is elevatedwthe operator then shifts the lever 3 8 to neutral. position whereupon the drill will be allowed t6 drop, unwinding the cable from the reel 32. When the drill 1` 1V'strikesthe rbottom of the hole being drilled the operator pulls upon the lever 4:9 and en gages the band 48 with the drums to prevent further rotation and subsequent back lashing of the cable. Then it is desired to use the sand line the same operation is gone through with except that the lever 38 is moved toengage the clutch member 39 with the reel 33.

Pivoted upon the frame are latch members 5() and 51 adapted -to enter holes in the flanges of the drums 32, and 33, respectively, whereby to lock either drum against movement when the other is bein used.

From the foregoing descriptlon and a study of the drawings it will be a parent that I have thus providedfa simp y constructed and easily operated and controlledV well drilling rig which will be highly eficient and which is free from complexity in every respect.

While I 'have shownand described the preferred embodiment of my invention, it is of course to be understood that I reserve the right to make such changes in the form, construction, and arrangement of parts as wi 'l not depart from the spirit of the invention or the scope ofthe subjoined claims.

Having thus described my invention, I claim:

- 1. A well drilling rig comprising in com bination, a supporting frame,'a derrick, an .engine mounted upon the frame, a counter shaft journaled upon the frame, means for driving,r said counter shaft from the engine, a windlass structure driven from the counter shaft and including separate reels, one for the main drilling cable and the other for the sand line, a brake mechanism associated with said reels, and means for throwing either of said reels into operation comprising a hollow driven shaft operatively connected with the counter shaft, the reels being rotatable upon said hollow shaft, a clutch shaft slidable through said hollow shaft and carrying a clutch member, a lever connected with said clutch shaft, and said reels being each provided with a clutch face engageable selectively by said clutch member, and means for locking either reel againstmovement.

2. A well Vdal-filling rig comprising in combination a supporting frame, a derrick, an engine mounted upon the frame, a counter shaft journaled 'upon the frame, means for driving said countersliaft from the engine,

a windlass structure driven from the counterl shaft and including separate reels, one for the main drilling cable and the other for the sand line, a l,brake mechanism associated with said reels, and means for throwing either of said reels into operation comprising a hollow shaft upon which said reels are rotatably mounted, said shaft being rovided with a longitudinal slot, a clutch s aft slidably disposed within said hollow shaft,

` means for shifting said clutch shaft, a clutch member slidiible upbn said hol-low shiift und having :i transverse pin disposed throgh siiid slot :uid through siiid clutch shaft, ond the mooring ends of siiid reels living formed with elutih l'iues ongfzigeiihle by said eliiteh niemher. v

3. A well drilling' rig` comprising' in comliiniition :i supporting frame, n derriek, iin

engine 'mounted upon the iii-inne, ii counter l shuffjoui'nnlrd upon thil Viirnme, means for driving' sind counter sliiilt from the engine,

ii windliiss structure driven from the eoun--y :ire rotatably mounted, said shaft being provided with :i longitudinal slot, :i clutch shaft slidiibly disposed Within said hollow shaft, means for shiftin;` said clutch shaft, a clutch iiiemlicr slidiible upon sind hollow shaft and having a transverse pin disposed through said slot n nd through siiid Clutch shaft, and

lthe meeting ends of sri-id reeds beingformed with clutch fiices engiigeiible by said cluteh member, sind meeting ends of the reels being 'formed with holes engageiible byV pins on the clutch member.

In testimony whereof I affix my` signaftme.

ing* recessed 'for the accommodation of the yvlutehmemlier whereby to form a projectlon therefor und the bottoms of the recesses be 

